AIVC - Air Infiltration and Ventilation Centre

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air tightness

Survey of occupants in dwellings with an air heating and ventilation system. Bewonersonderzoek in woningen voorzien van een luchtverwarmings- enventilatiesysteem.

50 occupants of terraced houses, divided into 4 groups, were surveyed three times in October 1981, February 1983 and March 1983. The first group had Isolair air heating and ventilating systems, and were well insulated with double glazing. The second group was heated by radiators and had the same insulation as group 1. Groups 3 and 4 had normal insulation. Results of the surveys are given. The air heating and ventilating system did not provide the level of satisfaction hoped for. The group with the air heating and ventilating system was surveyed again in March 1984.

Energy economy in the Torpparinmaki low-rise housing units. Summary report. Energiatalouden seuranta Torpparinmaen pientaloalueella. Yhteenvetoraportti.

Measurements were made in the PIKO low-rise pilot building project to study air tightness, interior air quality, and air heating in 15-30 residences in various seasons. Exterior wall air tightness was measured in 70 units and repeated in 10.

Effect of reduced building ventilation rates on occupant exposure and response to carbon monoxide.

In the weatherization of building structures to minimize convective heat loss, the air exchange rate is reduced. Pollutants of indoor origin are retained near the occupants. Further, outdoor pollutants may be concentrated indoors under partic

Airtightness and wall construction in prefabricated Swedish single family houses, 1984.

This survey describes how external walls and joints are constructed in practice. The paper gives you an opportunity to compare how successful the implementation of airtightness has been in Sweden in comparison with the results presented in the report D2:1983 "Air infiltration control ..." by A Elmroth and P Levin. The survey covers the majority of all Swedish prefabricated single family houses constructed in 1984. All big prefabrication companies are included in the survey.

Philosophy and background of the Dutch standard for airtightness of dwellings.

This paper discusses the situation in the Netherlands with respect to air tightness of dwellings and reflects discussions about this in the Dutch Standard Committee on Air Tightness of Buildings. Results of measurements and calculations are given and the considerations of different groups in thediscussion are included. Finally an attempt is made to produce a model for the prediction of air flow rates, infiltration losses and seasonal gas consumption on the basis of air leakage measurements.

When and where is make-up air necessary?

Negative pressure inside a building may create adverse or dangerous conditions. Discusses when make-up air is necessary, how need is determined, and how much make-up, with examples.

Indoor air quality. 20 existing homes.

Complaints related to moisture problems in houses which had been air sealed, led to a study of indoor air quality in 20 weatherized demonstration homes in the Cambridge, Ontario area. 

Code for controlled non-tightness of walls, and protection against excessive pressure differences in cold stores. Richtlijnen met betrekking tot de gecontroleerde ondichtheid van en debeveiliging tegen te grote drukverschillen in koude ruimten.

Deals with a code providing directives for design and construction of cold stores, drafted by the Foundation for Development of Refrigeration Technique (Stiftung Ontwikkeling Koeltechniek). Gives threshold values for admissible pressure difference and admissible measure of non-tightness, and values forthe required pressure equalizing opening, depending on nature and size of the cold room.

An optoelectronic device for the measurement of air tightness of buildings

Describes a method used for measuring the local air tightness of sections of buildings. Notes its superiority to a previous system developed by Siitonen V. in 1982. Illustrates the device schematically and explains its operation.